Improvement in metallic sieves



c. a. roman.

Metallic-sieves.

Patented Nov. 24,1874.

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UNITED STATES PATENT QFFICE.

CHRISTOPHER B. PORTER, OF PHILADELPH IA, PENNSYLVANIA.

IMPROVEMENT IN METALLIC SlEVES.

Specification forming part of Letters Patent No. 157,220, dated November 24, 1874; application filed October 29, 1874.

To all whom it may concern:

Be it known that I, CHRISTOPHER B. Pon- TER, of the city of Philadelphia, in the State of Pennsylvania, have invented an Improvement in Metallic Sieves, of which the following is a specification:

The object of my invention is to produce a more accurate and durable connection between the wire-cloth and the rim or body of a me-- tallic sieve, by constructing and uniting the different parts together substantially as hereinafter described with reference to the accompanying drawings, in which Figure l is a perspective view of a metallic sieve embodying my invention, and Fig. 2 an enlarged section cut vertically through one side of Fig. 1.

The rim A consists of sheet metal formed up to flare outward like the rim of a bakepan, wired at its upper edge, and a narrow flange, 0/, turned inward horizontally along its bottom edge. The wire-cloth B is then ap plied to the under side of said flange a, drawn tightly downward upon the same, and stuck fast by a little solder applied at a sufficient number of places along the same to hold the cloth B in place and allow the projecting edges of the same to be turned closely down around and against the outer side of the lower part of the rim A. (See Fig. 2.) A flanged ring of sheet metal, 0, is then fitted and pressed downward around the bent-down portion of the wire-cloth B until its inwardprojecting flange is brought into close contact with the wire-cloth B, which rests on the flange a of A, and the outward edge of said ringO is soldered fast at its edges to the wirecloth and the rim A, and, finally, the projecting edges of the wire-cloth are cut off near the covering edge of the said ring (3, as shown in the same figure. A cylindrical foot-band, D, is then wired and fitted closely around over the surrounding edges of the Wire-cloth and ring 0, and soldered fast around the rim A, so as to cover the outside edges of said cloth and ring, and also afford a foot-ring'for the sieve to rest upon, as represented in Fig. 1. The inner flange a is intended to be pressed down closely upon the wire-cloth, and the flange of the ring 0 also pressed closely against the opposite side of said cloth. (See Fig. 2.)

Tin-plate is the sheet metal intended to be used in the manufacture of these sieves; but thin sheet-brass and brass wire-cloth can be used instead, if desired.

It will be readily understood that a metallic sieve constructed .as described will be very strong, durable, and easily kept clean, and that the cost of constructing the same over the ordinary metallic sieves in use will be but little if any more.

I claim as my invention A metallic sieve consisting of the rim A, Wire-cloth B, flanged ring 0, and foot D, the said parts being constructed, arranged, and secured together substantially as described.

CHRISTOPHER B. PORTER.

Witnesses:

BENJ. MoRIsoN, WM. H. MoRIsoN. 

